Airflow window: numerical study and sensibility analysis of thermal performances

In this paper, the thermal behaviour of a ventilated window is studied. The particularity of this system is the existence of an airflow passing between the glasses of a triple glazing. The aim is to preheat outdoor air entering the room both by heat loss recovery and by solar gains. To evaluate the thermal performances of the window, a 2D model simulating the heat and mass transfers within the airflow window has been developed, and validated from experimental results. The effects of several parameters on thermal performances are investigated, e.g. glass emissivity, air flow rate and convective coefficient.